vecnorm.m

强大的nurbs的工具箱 nurbs曲线

function nvec = vecnorm(vec)
% 
% Function Name:
% 
%   vecnorm - Normalise the vectors.
% 
% Calling Sequence:
% 
%   nvec = vecnorn(vec);
% 
% Parameters:
% 
%   vec		: An array of column vectors represented by a matrix of
% 		size (dim,nv), where is the dimension of the vector and
% 		nv the number of vectors.
% 
%   nvec		: Normalised vectors, matrix the smae size as vec.
% 
% Description:
% 
%   Normalises the array of vectors, returning the unit vectors.
% 
% Examples:
% 
%   Normalise the two vectors (0.0,2.0,1.3) and (1.5,3.4,2.3)
%
%   nvec = vecnorm([0.0 1.5; 2.0 3.4; 1.3 2.3]);

%  D.M. Spink
%  Copyright (c) 2000.

nvec = vec./repmat(sqrt(sum(vec.^2)),[size(vec,1) ones(1,ndims(vec)-1)]);